<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // 定义数组
    var arr = [10,15,2,32,5,4,20,8,48,54,6]
    // 定义一个空数组接收小于10的数据
        var arr1 = []
        // 循环遍历筛选小于10的数据并放到创建好的空数组里去
    for(var i = 0;i<arr.length;i++){
        if (arr[i] <10) {
            arr1.push(arr[i])
        }
    }
    // 打印
    console.log(arr1);
    
    </script>
</body>
</html>